Parse an xml file using fast-xml-parser -- 2

I need to parse an xml file that is inside another xml file. Please modify the follow code to parse it correctly. Thank you. You should use the package [login to view URL] The second xml is on the route ["AttachedDocument"]["cac:Attachment"]["cac:ExternalReference"]["cbc:Description"] When you parse it you should be able to get an json object. To check if is working you should be able to get the route ["Invoice"]["cbc:ID"] on the second xml. //Parse xml file Intermediate obj const tObj = [login to view URL](xmlData,options); //[login to view URL](data, 'base64').toString() const jsonObj = [login to view URL](tObj,options); const prueba = jsonObj["Invoice"]; if(prueba != undefined){ numFactura = jsonObj["Invoice"]["cbc:ID"]; saveInvoice(jsonObj,numFactura); } else { //Get Invoice text const invoice = jsonObj["AttachedDocument"]["cac:Attachment"]["cac:ExternalReference"]["cbc:Description"].toString(); const tObj1 = [login to view URL](invoice,options); const jsonObj1 = [login to view URL](tObj1, options).toString(); numFactura = 'Prueba2'; //jsonObj1["Invoice"]["cbc:ID"]; saveInvoice(jsonObj1,numFactura);